Copyright, 1894, 1929, by 

 CHARLES SCRIBNER'S SONS 



Copyright, 1922. by henry FAIRFIELD OSBORN 



Printed in the United States of America 



Published July, 1894. Reprinted September, 1896; 

 December, 1899; December, 1902; November, 1905; 

 October, 1908; February, 1913; May, 1924. Second 

 edition, extended and completely revised, 1929. 



6-<' 



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